Question

我已经从A-Z创建了一个字符串数组，其中包含0-25的索引。

然后我有一个文本框，当我在文本框中输入文本时，如何获得与我输入的文本相关联的数组的索引号？

例如，我在文本框中输入“AB”，索引返回值应为0和1.

如果我只输入一个字母的字母，下面的代码只能返回索引。如何返回许多字母的索引号？

Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click

    Dim abc(25) As String
    abc(0) = "a"
    abc(1) = "b"
    abc(2) = "c"
    abc(3) = "d"
    abc(4) = "e"
    abc(5) = "f"
    abc(6) = "g"
    abc(7) = "h"
    abc(8) = "i"
    abc(9) = "j"
    abc(10) = "k"
    abc(11) = "l"
    abc(12) = "m"
    abc(13) = "n"
    abc(14) = "o"
    abc(15) = "p"
    abc(16) = "q"
    abc(17) = "r"
    abc(18) = "s"
    abc(19) = "t"
    abc(20) = "u"
    abc(21) = "v"
    abc(22) = "w"
    abc(23) = "x"
    abc(24) = "y"
    abc(25) = "z"

    Dim result = abc.Where(Function(a) a.Contains(TextBox2.Text)).Select(Function(s) Array.IndexOf(abc, s)).ToArray()

    Dim x As Integer
    For Each x In result
        MsgBox(x)
    Next

End Sub

Answer 1

编译并完美运行：

Module Module1

    Sub Main()

        Test("Leniel")

    End Sub
    Sub Test(ByVal text As String)

        Dim alphabet() As String = {"a", "b", "c", "d", "e",
                                    "f", "g", "h", "i", "j",
                                    "k", "l", "m", "n", "o",
                                    "p", "q", "r", "s", "t",
                                    "u", "v", "w", "x", "y", "z"}

        Dim indexes = From letter In text.ToCharArray() _
            Select Array.IndexOf(alphabet, letter.ToString().ToLower())

        Dim i As Integer
        For Each i In indexes
            MsgBox(i)
        Next

    End Sub

End Module

它将分别显示在消息框中：

'l   e  n   i  e  l
 11, 4, 13, 8, 4, 11

Answer 2

首先想到的是在文本框输入上使用.split方法来获取字符数组。对数组中的每个元素执行搜索，将每个匹配添加到结果数组中。

Answer 3

有一百万种方法可以解决这个问题。

一个解决方案：

1）获取文本

Dim theText = TextBox2.Text

2）对于该文本中的每个字母，获取该号码（并将其显示为消息

Dim c As Char
For Each c In theText
   MsgBox(translateCharacter(c))
Next

Public Function translateCharacter(ByVal c As Char) As Integer
    translateCharacter = abc.Where(Function(a) a.Contains(c)).Select(Function(s) Array.IndexOf(abc, s)).ToArray()
End Function

如果编译，它应该逐个弹出每个数字。我使用了与翻译角色相同的功能（即得到结果）。还有其他方法可以做到这一点，我只是想解决你的主要问题，指出你可以迭代字符串中的所有字符。

我希望有所帮助，

- gMale

从数组中获取多个索引值

3 个答案: